SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
SSL/TLS Certificate for u-nas.cz
Valid- Issued by (CA)
- Google Trust Services
- Subject
- u-nas.cz
- Valid from
- Aug 22, 2026
- Valid until
- Nov 20, 2026 (61 days remaining)
- Public key
- EC 256-bit
- Serial
- F4F2C4C6D95DB73A0E010CD56EFF228C
- SHA-256 fingerprint
- 97:26:7B:EA:BE:33:B8:64:C6:4D:91:C5:03:03:16:EB:C3:72:D7:3D:87:B2:A2:B5:EA:6D:4F:B9:C2:18:3D:84
- Chain
- WE1 → GTS Root R4
Certificate Authority Authorization (CAA)
No CAA policy is published for this domain — any certificate authority may issue for it.
Never get surprised by u-nas.cz's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch u-nas.cz continuously, notifying you the moment anything moves across all three signals:
Uptime
We visit the site from multiple regions worldwide and email you within minutes if it goes down, with a per-region breakdown so a real outage stands out from a regional blip.
DNS changes
We watch NS, MX, CAA, DNSSEC, CNAME and A/AAAA records, and identify the host, network, and ASN behind them, so a real migration or hijack stands out from routine noise.
TLS certificate
We warn you 30, 14, 7, and 1 days before it expires, and flag it if the issuing authority changes or the certificate is unexpectedly replaced.
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